OSTC firmware 2.70 possible bug in diving log
Posted: Sunday 7. July 2013, 16:25
I recently updated to 2.70 and I believe I ran into a bug (possibly serious and unsafe if also affects deco calculation but I do not think so).
I usually dive with a HW OSTC2 with me which is my primary and then a Suunto Vyper in gauge mode as backup and dive tables Computers are backup not primary, so as long as timers and depth are ok, I will survive the dive
) Anyway, today the plan was for a dive on a wreck at 49 mt max (operational depth was 47 calculations for 49) bottom time 20.
Gas was Air on bottom, Nitrox 50 from 21mt and Oxy at 6 mt.
Apparently everything went fine while diving but once home the download of the dive was as follows:
[img]http://www.sardone.info/misc_host/OSTC/HW_bug1.png[/img]
This is a download of the dive into MACdive. As soon as I do the first gas change for some reason the recording of depth was erratic (it was adding zero depth datapoint to the dive profile) but during the first gas change the depth was changing between the actual dept and zero.
After the second gas change was even worst singe the recorded depth was flip flopping between 0 and 50 meters.
Now the decompression profile apparently was good and consistent with my tables and the displayed depth correct (I once in a while crosscheck with my backup), but nevertheless all of these issues with 2.70 make me consider going back to previous beta ....
As a reference also attached my backup instrument recorded dive profile .....
Happy Diving
Fabio
[img]http://www.sardone.info/misc_host/OSTC/HW_bug2.png[/img]
I usually dive with a HW OSTC2 with me which is my primary and then a Suunto Vyper in gauge mode as backup and dive tables Computers are backup not primary, so as long as timers and depth are ok, I will survive the dive

Gas was Air on bottom, Nitrox 50 from 21mt and Oxy at 6 mt.
Apparently everything went fine while diving but once home the download of the dive was as follows:
[img]http://www.sardone.info/misc_host/OSTC/HW_bug1.png[/img]
This is a download of the dive into MACdive. As soon as I do the first gas change for some reason the recording of depth was erratic (it was adding zero depth datapoint to the dive profile) but during the first gas change the depth was changing between the actual dept and zero.
After the second gas change was even worst singe the recorded depth was flip flopping between 0 and 50 meters.
Now the decompression profile apparently was good and consistent with my tables and the displayed depth correct (I once in a while crosscheck with my backup), but nevertheless all of these issues with 2.70 make me consider going back to previous beta ....
As a reference also attached my backup instrument recorded dive profile .....
Happy Diving
Fabio
[img]http://www.sardone.info/misc_host/OSTC/HW_bug2.png[/img]